diff --git a/LED_RGB_WS2812/guirlandes noël/a_guirlande.lua b/LED_RGB_WS2812/guirlandes noël/a_guirlande.lua
index 9ce7bff..828e65d 100644
--- a/LED_RGB_WS2812/guirlandes noël/a_guirlande.lua	
+++ b/LED_RGB_WS2812/guirlandes noël/a_guirlande.lua	
@@ -2,34 +2,40 @@
 -- tout sur la couleur: https://www.w3schools.com/colors/default.asp
 -- roue des couleurs: https://iro.js.org/?ref=oldsite
 
-print("\n a_guirlande.lua zf181216.0020 \n")
+print("\n a_guirlande.lua zf181216.0131 \n")
 
 znbleds_max=300
 znbleds=300
-zstep=1
+zstep=5
 zpower=1
 
+zleds={}
+zledinc={}
+
 function RGB_clear()
     ws2812.init()
     buffer = ws2812.newBuffer(znbleds_max, 3)
-    buffer_reg = ws2812.newBuffer(znbleds_max, 3)
     buffer:fill(0, 0, 0)
     ws2812.write(buffer)
 end
 
+function zleds_init()
+    for i=1, znbleds, zstep do
+        zleds[i]=0
+    end
+end
+
 function zfaderando()
     for i=1, znbleds, zstep do
-        r, g, b=buffer:get(i)
-        r=r+zledinc[i]   g=g+zledinc[i]   b=b+zledinc[i]
-        if r >255 then
-            r=255   g=255   b=255
+        zleds[i]=zleds[i]+zledinc[i]
+        if zleds[i] >255 then
+            zleds[i]=255
             zledinc[i]=zrando()
         end
-        if r <0 then
-            r=0   g=0   b=0
+        if zleds[i] <0 then
+            zleds[i]=0
             zledinc[i]=zrando()
         end
-        buffer:set(i, r, g, b)
     end
 end
 
@@ -44,12 +50,17 @@ function zrando()
 end
 
 function zincfill()
-    zledinc={}
     for i=1, znbleds, zstep do
         zledinc[i]=zrando()
     end
 end
 
+function zbufferfill()
+    for i=1, znbleds, zstep do
+        buffer:set(i, zleds[i], zleds[i], zleds[i])
+    end
+end
+
 function zeffect_stop()
     tmr.unregister(effect_tmr1)
     RGB_clear()
@@ -57,13 +68,20 @@ end
 
 function zeffect_start()
     effect_tmr1=tmr.create()
-    tmr.alarm(effect_tmr1, 200,  tmr.ALARM_AUTO, function()
+    tmr.alarm(effect_tmr1, 300,  tmr.ALARM_AUTO, function()
         zfaderando()
+        zbufferfill()
         zpower_reg()
-        ws2812.write(buffer_reg)
+        ws2812.write(buffer)
     end)
 end
 
+function zfade(f)
+    for i=1, znbleds, zstep do
+        r, g, b=buffer:get(i)
+        buffer:set(i, r*f, g*f, b*f)
+    end
+end
 
 function zpower_reg()
     psu_current_ma = 1000
@@ -78,16 +96,19 @@ function zpower_reg()
 --    print(led_sum)
     
     p = buffer:power()
---    print(p,led_sum)
     if p > led_sum then
-        buffer_reg:mix(256 * led_sum / p, buffer) -- power is now limited
-    else
-        buffer_reg:mix(255, buffer)
+        f=led_sum/p
+--        print("f: ",f)
+--        print(p)
+        zfade(f)
+--        p = buffer:power()
+--        print(p)
     end
 end
 
 
 RGB_clear()
+zleds_init()
 zincfill()
 zeffect_start()